Improvement in millstone-dressers



3 Sheets-Sheet 1.

L. S. HOGEBOOM.

Millstone-Dresser.

No. 197,274. Patented Nov. 20, I877.

1% j 4 1 0 O g a K J 7i" I (m on m 0, Z I W m w w I \l T Q, 7 &

INVENTOR WITNESSES Tim d: ysm

ATTORNEYS.

1 N, FEI'ERS. FHOTO-LITNDGRAPHER, WASHINGTON. D C l 3 Sheets-Sheet 2. L. S. HOGEBOOM. Millstone-Dresser.

Patented Nov. 20, I877.

q ,1 I l m I INVENTOR. 956

JMo-re %IMJZ? ATTORNEYJ air/7'91 N, PErERs. PHord-L THOGRAFNER, wAsnmaiou u c 3 Sheets-Sheetfi- L. S. HOGEBOOM. Millstone-Dresser.

Patented Nov. 20, I877.

|NVENTOR 64M.

ATTORNEY WITNES? 4? 1% "PETERS, PHOTO LITHOG HER. WASHINGTON D C UNrrEn STATES PATENT OFFICE.

LEvrs. HoeEBooM, or THREE'RIVERS, MICHIGAN.

IMPROVEMENT 'IN MlLLSTONE-DRESSERS.

Specification-forming part of Letters PatentlToj. 197,274, dated November 20, 1877; application filed September 8, 1877.

the letters and figures of reference marked thereon. V

Figure 1 of the drawings is a representation of a side view of my millstone-dresser. Fig. -2 is a sectional detail. Fig.3 is a longitudinal vertical sectional view. Fig. 4*is a detail plan view; and Figs. 5, 6, 7, 8, 9, 10, 11, 12,

13,14, and 15 are detail viewsthereof.

The nature of my invention consists in the construction and'arrangement of a machine for dressing millstones, as-will be hereinafter more fullys'et forth.

The annexed drawings, to which reference is made, fully illustrate my invention.

A represents the. vmillstone to be dressed, provided with the eye A, around which, on top of the stone, is secured a frame, B,leveled by means of set-screws a a. This frame B is formed with a tubular upwardly-projecting center, B with a'shoulder or offset, b, around its lower end. Around the center B is placed a cylindrical casing, G, which rests-upon the shoulder b, and'which carries theentire mechanism. The casing O is movable around the center B, so as to bring the cutting-wheel to bear upon any part of the millstone by simply turning the casing on its center. The casing is held at any point desired by a set-screw, d,

passingthrough the same, and bearing against the outside of the center B. 7

On top of the tubular center 13 is fastened a plate, D, which extends over an interior shoulder in the top part of the casing, and holds said casing down upon its seat. This I plate is provided with a downwardly-projectgear wheel, G, which meshes with a pinion,

e, on the inner end of a shaft, f. This shaft has its bearing in a hollow arm, h, projecting from the side of the casing, at or near the top, and on the outer end of the shaft is a bandwheel, H.

From the side of the casing '0 projects a horizontal arm, I, attached to flanges on the casing by means of bolts, and so arranged that it can be thrown, at a slight inclination, either up or down, if desired.

The arm I is formed with longitudinal grooves in its upper and lower edges, and in the same slides a carriage, J, back and forth, operated automatically by devices, as will be hereinafter described. Y

-' On this carriage is an L-shaped arm, K,

movable up and down upon guides i t',and adjusted by means of a screw, k. The horizontal part of the arm K is, on its under side, provided with dovetailed guides m, on which slides a frame, L, carrying in its lower portion a pulley, M, and cutting-wheel N.

It will readily be seen that, by the up-anddown adjustment of the arm K, and the lateral adjustment of the frame L, the wheel N can be brought to bear on the millstone at any angle desired, and with more or less pressure, according to the depth of the dress required.

n represents the screw for adjusting the frame L.

The carriage J supports two idle horizontal pulleys O, and O, the former being mounted upon a stationary stud, p, and the latter upon a stud, p, projecting from a slotted plate, 1), which is adjustable up and down upon the carriage to keep the belt 1? tight.p

This belt passes around the band-wheel H, and around a pulley, B, mounted upon an arm, S, attached to the stationary arm or way I. From below these the belt passes over the two idle-pulleys O O, and down and around.

the pulley M, by which arrangement the belt will always remain at the same tension when the carriage J moves back and forth.

The carriage is moved by the following means: The shaft E passes up through a covering-plate, G on top of the casing O, and above the same it is formed or provided with a pulley, E, around which is passed an endless belt, P, passing around a pulley, T, on an upright shaft, V, having its bearings in a frame or plates attached to the back of the arm I, on the casing O. The belt P is kept taut by means of a belt-tightener, W, arranged on top of the cover 0'.

On the upright shaft V are loosely placed? two bevel-gears,s s, which are placed one above and the other below, and both meshing with a bevel-gear, z, mounted on a short shaft in the arm I. On the other end of this shaft is a pinion, T, which gears with a rack-bar, 10, attached to the back of the carriage J.

Between the two gears s s, on the shaft V, is a double clutch, x, feathered to the shaft, and movable up and down, so as to be thrown in gear with either one of the said gears, and,

thus cause the carriage J to be moved in either plug; then holes drilled in the bottom of the direction.

The clutch w is moved automatically, at the proper time to reverse the motion of the carriage, by means of a T-shaped lever, A, pivf oted at its center on a stud at the back-of the arm J. One of the side arms of the lever v A forms a handle for moving the clutch by: hand. The other side arm is forked, and straddles the clutch in a circumferential groove 1 thereon.

The center arm of the lever A extends up- 1 ward, and is pivoted to a horizontally-shding= bar, 13", moving in suitable guides attached to the arm I. The other end of the bar B is formed with two notches, y y, into which takes a spring, G, for holding said bar, and pre-i venting the clutchw from slipping'or accident ally becoming moved from either of its positions.

On the bar B is an adjustable sleeve orsliding d, which shifts the clutch, and the i carriage at once returns. At the completion of the return-stroke the other stop 0 strikes the other arm I1 and the clutch is again shifted to reverse the carriage.

By adjusting the stops e -that is, moving them outward or inward-the amount or extent of movement of the carriage is easily regulated.

The carriage may be stopped by placing the clutch between the gears s 8, without being in :gear with either.

The arms I), being made of spring-wireor spring metal, yield a little tothe action'of the stops c and thus prevent any sudden jar to" the machinery.

The arm I,"which carries the operating mecih- :anism, is, as stated, adjustable, -so as to \be placed at an inclination. This is for the purpose of making the furrows deep or shallow at the eye of the stone, as desired, and the adjustment of the bar is accomplished by means of set-screws h h passing through the flanges =0 0 on the casing, between which the bar is placed, said set-screws bearing against the top and bottom edges of the bar at the inner end. The bar is then fastened by a bolt, k passing through a slot, i therein, as shown.

The arm S, which supports .the pulley R, is

' adjustable, so as to tighten the belt, as required, by a screw, S, passing through a small slot in the lever.

The studs or spindles upon which the pulleys R O O are placed are drilled out for oiling, and the end of the bore stopped by a spindle to conduct the oil to the bearings of the pulley-s.

The belt-tightening pulley W, above mentioned, is mounted on an spindle projecting from one arm of a lever, W, which is pivoted at one end, and -.adjusted by a setscrew in a slot in said lever.

The cutthig-wheel N is composed of *corun- I dum mixed with rock, millstone, or other hard substance.

It will be noticed that the machine is made so as to reverse and work-on furrows with lefthand draft as well as right-dread.

I claim as new, and desire to secure by Letters Patent, is-

1. 111 a mil lstone-dresser, the arm I, supporting the entire operating mechanism, held between flanges O on the easing G, and made adjustable by means of set screws h, substantially as and for the purposes herein set forth.

2. The conrbinartionof the mecipmeatingcarriage 4T, verticallyadjnstable arm K,aa1d the laterally adjustable lfirame L, carrying the emery-wheel N, substantially as and for the purposes herein :set ionth.

3. The arrangement-of the band-wheel H, the stationary idle-pulley *0, adjustable pulley 0, and Men the emea'ywvheel N, said three pulleys moving the carriage J, and the adjustable pulley B on the arm I, substantially as and for the punposes herein set forth.

4. Thezoombinaitionotf thedutehwflever A, notched sliding bar B2, spring C, spring arms l)", and the adjustable stops e :on the carriage J, substantially as and for the purposes herein set 501th.

in testimony that El above I have hereunto subscribed my name in the presence of two witnesses LEVI 'EI'OGEBGOM.

Witnesses:

Darn P. Nnvnvs, G. W. Buck. 

